CN109415096B

CN109415096B - Motor vehicle

Info

Publication number: CN109415096B
Application number: CN201780038155.6A
Authority: CN
Inventors: G·朗格; S·马斯松; F·特施; B·维尔纳
Original assignee: Bayerische Motoren Werke AG
Current assignee: Bayerische Motoren Werke AG
Priority date: 2016-07-06
Filing date: 2017-06-27
Publication date: 2022-03-29
Anticipated expiration: 2037-06-27
Also published as: US20190135100A1; WO2018007204A1; DE102016212297A1; US11040608B2; CN109415096A

Abstract

A Y-shaped rear support device for increasing the bending and torsional rigidity of a body in white is known from DE 10023110 a 1. The object of the invention is to provide a motor vehicle having a stable housing for an energy store on the bottom, which housing has a structurally simple rear support. This is achieved by: a housing for an energy store is arranged on the underbody, which housing comprises a cover, a floor and a surrounding frame, on the lateral side sections of which, viewed in the vehicle longitudinal direction x, are located at the rear, fastening means are arranged, on which the front ends of the two V-shaped extending reinforcing struts are arranged.

Description

Motor vehicle

Technical Field

The present invention relates to a motor vehicle.

Background

A high-voltage accumulator is known from US 2014/0193683a1, which is attached to an outer surface of the underbody of a motor vehicle. The motor vehicle may be an all-electric vehicle or a hybrid vehicle having at least one electric drive system. The housing of the high-voltage accumulator comprises a cover, a base and a surrounding side wall.

The high-voltage accumulator housing of US 2014/0193683a1 encloses a cavity in which the energy accumulator is arranged. The circumferential side wall is produced, for example, from an extruded profile. In one embodiment, the two longitudinal side walls extending in the longitudinal direction of the vehicle are connected to one another by a transverse beam, which can also be made of an extruded profile.

Such a beam is disclosed for example by US 8,833,839B 2. In US 8,833,839B 2a lateral crash protection extruded profile is attached to the respective lateral side wall.

A Y-shaped rear support device for increasing the bending and torsional rigidity of a body in white is known from DE 10023110 a 1. Furthermore, in DE 10023110 a1, an intermediate support of the rear support is provided between the longitudinal member and the receiving bracket or receiving component.

DE10214372C1 discloses a motor vehicle in which two rear reinforcing struts extending in a V-shape are arranged on the underbody. The front ends of the respective reinforcing supports are fixed to the lateral longitudinal members below the passenger compartment. One of the respective ends of the reinforcing brace opposite this end is fixed to the bottom of the vehicle rear by a connecting region.

Disclosure of Invention

The object of the invention is to provide a motor vehicle having at least one electric drive system, in which the stiffening of the vehicle rear is simplified.

The object is achieved by a motor vehicle according to the invention, comprising: a vehicle body having a passenger compartment; a longitudinal member extending over the underbody, the longitudinal member extending from a front end of the vehicle through the passenger compartment to a rear end of the vehicle; two rear, V-shaped, extending reinforcing struts, the rear ends of which are arranged on the floor of the vehicle rear via a receiving element, the two rear, V-shaped, extending reinforcing struts lying substantially in a horizontal plane, characterized in that a housing for an energy store is arranged on the vehicle underbody, which housing comprises a cover, a floor and a surrounding frame, on the lateral side sections of which, viewed in the vehicle longitudinal direction, are arranged at the rear, on which fixing means the front ends of the two rear, V-shaped, extending reinforcing struts are arranged, the lateral side sections of which are part of a frame part which is designed in a U or V shape, and the receiving element is fixed vertically or obliquely upward to the rear on the floor of the rear region of the vehicle body.

Drawings

Embodiments of the present invention are exemplarily described below with reference to the accompanying drawings. In the drawings:

FIG. 1 is a perspective view of the underside of a motor vehicle underbody assembly;

FIG. 2 is an enlarged view of a portion of FIG. 1 showing the connection of two V-shaped extending torsion bars between the energy storage housing and a receiving bracket secured to the underbody; and is

Fig. 3 shows a side view of the base assembly shown in fig. 1, from which it is seen that the torsion bar is arranged horizontally on a vertically arranged receiving mount.

Detailed Description

Fig. 1 shows a partially illustrated underside 2 of a motor vehicle 1. A housing 4 of an energy store 5 is provided below a passenger compartment, not shown, of the partially illustrated vehicle body 3. The housing 4 comprises a cover 56, a bottom 55 and a surrounding frame 9. Such an energy store 5 is known, for example, from US 2014/0193683a1, the construction of which is referred to in this document.

In the embodiment shown, the energy store 5 housing 4 shown in fig. 1 comprises essentially three housing sections 6, 7, 8.

The front housing section 6, as viewed in the longitudinal direction x of the vehicle, is designed, for example, as a plate-and-shell structure. The edge section 6a of the front housing section 6 is designed as a frame, which is basically U-shaped in plan view. The edge section 6a of the front housing section 6 is arranged with its

respective end

6b, 6b' on the circumferential frame 9 of the intermediate housing section 7 connected thereto.

The inner edge of the circumferential frame 9 of the middle housing section 7 is shown in fig. 1 by a dashed line. The frame 9 is made of an extruded profile, for example. An outer lateral longitudinal member 12, 13 is provided on each of the two opposite longitudinal side walls 10 and 11 of the frame 9, which serves as a lateral crash protection in the transverse direction y of the vehicle.

In one embodiment, the intermediate housing section 7 has at least one transverse beam 14 extending in the transverse direction y of the vehicle, which is shown in fig. 1 by a dashed line. Together with the front and rear

transverse side walls

15, 16 of the shell segment 7, the existing number of transverse beams 14 in combination with the two outer lateral longitudinal beams 12, 13 and the longitudinal side walls 10, 11 of the frame 9 prevents the middle shell segment 7 from being deformed in a lateral collision.

The rear transverse side wall 16 of the middle housing section 7 is connected to the rear housing section 8. The rear housing section 8 is surrounded in the embodiment shown by a U-shaped frame part 17. The respective end faces 18, 19 of the frame part 17 bear against the respective end faces 20, 21 of the respective longitudinal side walls 10, 11.

The U-shaped edge section 6a of the front housing section 6, the two opposite longitudinal side walls 10 and 11 of the frame 9 of the middle housing section 7 and the U-shaped frame part 17 of the rear housing section 8 form a closed, circumferential outer frame 22.

The U-shaped frame part 17 has a transverse side section 23 and longitudinal side sections 24, 25 extending obliquely thereto. In the embodiment shown, two fastening means 26, 27 are provided on the lateral side sections 23 of the frame part 17, spaced apart from one another. The fastening means 26, 27 are in the embodiment shown configured as projecting flange sections.

The flange portion may be integrally formed on the lateral side portion 23 of the frame part 17 or may be fastened as a single component to the outer surface 28 of the lateral side portion 23.

In a further embodiment, the two fastening means 26, 27 spaced apart from one another are configured, for example, as recesses, such as threads or through holes, with connection possibility in the lateral side sections 23 or in the longitudinal side sections 24, 25 of the frame part 17.

Next to the rear housing section 8 in fig. 1 is a floor assembly 30 of the vehicle body 3, which is directed toward the rear region 31 of the motor vehicle 1. Wheel covers 32 and 33 are configured on both sides of the base assembly 30. The wheel cover 33 is shown in fig. 3.

In the rear region 31, in the direction of a trunk or luggage compartment of the motor vehicle 1, not shown, rear longitudinal members 61 and 62 are provided, spaced apart from one another, which extend in a known manner from the rear-side vehicle end 60 in the vehicle longitudinal direction x forward toward the side sill, not shown. The longitudinal beams 61 and 62 are connected to each other in the embodiment shown by a rear transverse beam 63 and a front transverse beam 72.

The receiving member 36 is centrally fixed with respect to the vehicle transverse direction y on the outer face 34 of the bottom section 35 connecting the two rear longitudinal beams 61, 62 facing away from the motor vehicle 1. In the embodiment shown in fig. 1 and 3, the receiving member 36 is fixed to the cross member 63.

As can be seen from the perspective view of fig. 2, the receiving member 36 has a trapezoidal structure as viewed in the vehicle longitudinal direction x. In the illustrated embodiment of the receiving member 36, a base member 37 is provided, on which base member 37 supports 38, 39, 40, 41 are provided that extend downward, i.e. obliquely in the vertical direction z.

The supporting

elements

38, 39, 40, 41 are connected to one another in the illustrated embodiment in the

intermediate regions

42a and 42b by horizontally extending reinforcing

ribs

43a, 43b, 44, 45. The

lower end portions

38a, 39a, 40a, 41a of the

supports

38, 39, 40, 41 are fixed to the base member 37. A fixing plate 47 is provided on the

upper end portions

38b, 39b, 40b, 41b of the

support members

38, 39, 40, 41.

The

rear ends

48, 49 of two reinforcing

struts

50, 51 extending in a V-shape are fastened to the fastening plate 47. The front ends 52, 53 of the reinforcing supports 50, 51 are fixed to corresponding flange sections on the lateral side sections 23 of the frame part 17.

The two reinforcing supports 50, 51 are at a predetermined distance x from the receiving member 36 and thus the flange section in the vehicle longitudinal direction x₅₄Are connected to each other by an intermediate support 54 extending in the vehicle transverse direction y.

Fig. 2 shows an enlarged view of the arrangement of the receiving element 36, the reinforcing supports 50, 51 fixed thereto, the intermediate support 54 and the two flange sections on the lateral side sections 23 of the frame part 17. Furthermore, it can also be seen in fig. 2 that the frame part 17 is covered in the illustrated embodiment by a pot-shaped cover 56.

Fig. 1 and 2 furthermore show two

fastening elements

66 and 67, which are fastened to the underbody assembly 30 of the body 3 of the motor vehicle 1. Two

fastening elements

68, 69 are formed on the lateral side sections 23 of the frame part 17 of the housing 4. The two fixing

elements

68, 69 are fixed to the two fixing

members

66 and 67, for example by means of fastening means 70, 71, such as screws or the like.

The two

fastening elements

68, 69 can be designed as separate components, as is shown in fig. 1 and 3. In another embodiment, the two

fastening elements

68, 69 are formed integrally with the two fastening means 26, 27 as one component.

Fig. 3 shows the housing 4 of the energy store 5 and the rear region 31 of the underbody assembly 30 of the body 3 of the motor vehicle 1 arranged thereon. The wheel cover 33 can be seen in fig. 3. As shown in fig. 3, the reinforcing supports 50, 51 extend horizontally. The receiving member 36 is arranged vertically in the z-direction in the embodiment shown. In another embodiment receiver member 36 is angled rearwardly.

Furthermore, fig. 1 and 3 show in hatched lines the front end fixing region 64 of a reinforcing support (similar to the reinforcing support (50)51), known from DE 10023110 a1 or DE10214372C1, not shown, which is located in the height of the respective front end 65 of a side sill or (lateral) longitudinal beam, not shown in more detail, or longitudinal beams 61 and 62, not shown below the passenger compartment.

In contrast to the connection of the front ends of the reinforcing struts of DE 10023110 a1 and DE10214372C1, which are provided on two side sills or (lateral) stringers, the reinforcing

struts

50, 51 according to the invention are designed to shorten the length of the longitudinal side sections 24, 25 of the frame part 17 approximately.

The reason for the shortening of the reinforcing

struts

50, 51 according to the invention is that the reinforcing

struts

50, 51 are fastened to the two fastening means 26, 27, which are designed as flange sections, on the lateral side sections 23 of the frame part 17 of the energy storage housing 4.

Furthermore, an intermediate support, which is supported on the vehicle floor between the longitudinal member and the receiving bracket or receiving component 36, as is known, for example, from DE 10023110 a1, can be dispensed with.

Claims

1. Motor vehicle (1) comprising: a body (3) having a passenger compartment; a longitudinal beam extending on the bottom of the vehicle body (3), said longitudinal beam extending from the front end of the vehicle through the passenger compartment to the rear of the vehicle; two rear, V-shaped, extending reinforcing supports (50, 51), the rear ends of which reinforcing supports (50, 51) are arranged on the bottom of the vehicle rear by means of a receiving means (36), the two rear, V-shaped, extending reinforcing supports (50, 51) lying in a horizontal plane, characterized in that a housing (4) for an energy store (5) is arranged on the bottom of the vehicle body (3), which housing (4) comprises a cover (56), a bottom (55) and a surrounding frame (9), that fastening means (26, 27) are arranged on rear, viewed in the vehicle longitudinal direction, transverse side sections (23) of the frame (9), on which fastening means the front ends (52, 53) of the two rear, V-shaped, extending reinforcing supports (50, 51) are arranged, that the rear, transverse side sections (23) of the frame (9) are part of a frame part (17) which is designed in a U or V shape, and the receiving member (36) is fixed vertically or obliquely upward and rearward to the bottom of the rear region (31) of the vehicle body (3).

2. Motor vehicle according to claim 1, characterized in that the housing (4) comprises at least a middle housing section (7) or a middle housing section (7) and a rear housing section (8) or a front housing section (6), a middle housing section (7) and a rear housing section (8).

3. A motor vehicle according to claim 1 or 2, characterized in that the rear transverse side section (23) of the frame (9) is made of light metal or steel sheet shell construction.

4. Motor vehicle according to claim 2, characterized in that fixing means (26, 27) are provided on the frame part (17) of the rear housing section (8).

5. A motor vehicle according to claim 2, characterized in that the fixing means (26, 27) are provided on the intermediate housing section (7) when the rear housing section (8) of the housing (4) is not present.

6. A motor vehicle according to claim 1 or 2, characterized in that the fixing means (26, 27) are protruding flange sections.

7. Motor vehicle according to claim 1 or 2, characterized in that the fixing means (26, 27) for reinforcing the front end (52, 53) of the support (50, 51) are spaced apart from the lateral longitudinal beams (12, 13) of the housing (4) in the transverse direction of the vehicle.